I tried Alex's fix (disabe session management in compiz) and it may have made the hangs less frequent, it has not solved the issue on 3 different sets of hardware.
As an aside, some dual-boot testing on a couple of machines with Mint 12, using Cinnamon and Gnome Shell sessions results in zero shutdown hangs. AFAICT the issue lies in something exclusive to "genuine" Ubuntu/Unity and the way it's doing a shutdown. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/882817 Title: shutdown screen stuck after upgrade to Ubuntu 11.10 Status in Ubuntu: Invalid Status in “network-manager” package in Ubuntu: Triaged Bug description: After the update from 11.04 to 11.10: when I shut down the pc sometimes it goes back to the login screen and then I have to do shutdown there which works well then. Sometimes the pc shuts down but ends with the ubuntu splash screen and gets stuck there. The issue may be driver related: I use the AMD/ATI FGLRX graphics driver. I have a second pc where I also did the update to 11.10 and there I have no problem at all but I don't use the above driver but the NVIDIA graphics driver. Both pc's have Ubuntu 11.10 64-bit. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/882817/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp